Painting advice please?

looksee

I recently purchased a drawer unit from a kitchen fitters, it is the type that is intended to be painted in the factory. I wanted to paint it myself so they said they could supply it primed, and I agreed.

The unit has been fitted, and painted with Colourtrend water-based satinwood paint. However in the course of the work a small bit of paint was rubbed off which I said I would touch up. When I went to look at it I discovered the paint could be stripped with a fingernail. It is very 'soft'. (painted last week)

So, I am not looking for someone to blame, the kitchen suppliers could possibly have said that the primer was for laquer paint, the painter could have realised that the surface was not suitable, the paint might have been wrong. I should maybe have asked more questions, but I didn't.

What is the next step. If I put it right myself I could scrape off the paint but what to put on so that a top coat will 'stick'. Should it be an oil-based paint (there was a good reason for using water based, but if necessary I will get oil based)? Would sanding help? I am pretty sure it will not be possible to take off the primer, but the surface could be sanded, would that be enough? It will not be subject to hard wear (its not in a kitchen).Any suggestions appreciated.

Oscar15

I painted my kitchen cupboards myself, I got it from the supplier ready primed.

I used zinsser BIN over the primer and then a couple of top coats of Matt washable emulsion.

nearly 8 years on and the cupboards only have a few worn areas - and these are on the very high use areas, like the dishwasher, fridge and cupboard where we keep the mugs.

fussyonion

Put some MDF primer on or BIN, leave it to dry. If you use BIN, it'll be dry in 10-15 minutes.
Then you can paint using the water-based paint.